1. Used to let others understand that you disagree with their opinions and ideas.

2. Used as an indicate to people that something is whack.

3. Used to annoy the shit out of people.

4. Can be used as a prefix or a suffix, to create different fighting techniques; just as long as one states the word Regh twice, then the fighting move they want to use. Only then can the move be executed.

Examples:

1.

Sally: I really, really love Twilight, I think it's the best book ever!
Andrew: REGHHHHHHHHHHH